Part 2: Mastering Variables with Inspire Python APIs - Motion

Karthi Kandasamy
Karthi Kandasamy
Altair Employee
edited December 19 in Altair HyperWorks

Motion

This discussion explains the Python code for assigning variables to motion entities such as motors, actuators, coil springs, torsion springs, translational initial conditions, rotational initial conditions, and motion contact friction coefficients.

Motor

#Create variable

model.variables.add("Angle", type=None, expression='100 deg')

model.variables.add("Speed", type=None, expression='100 rpm')

model.variables.add("Acceleration", type=None, expression='100rad/s^2')

model.variables.add("Torque", type=None, expression='10 N*m')



#Motor's value can passed in four different ways (Angle, Speed, Acceleration, Torque) based 

in its Type.

#Query an existing Motor  with its name 'Motor 1'

Motor = model.getChild(type ='Motor', name = 'Motor 1')



if Motor:

  #Assign Motor type as ANGLE and assign a Angle variable

  Motor.type = 'ANGLE'

  #Asign the variable to the Motor.

  Motor.value='Angle'



  #Assign Motor type as SPEED and assign a speed variable

  Motor.type = 'SPEED'

  #Asign the variable to the Motor.

  Motor.value='Speed'



  #Assign Motor type as ACCELERATION and assign a Acceleration variable

  Motor.type = 'ACCELERATION'

  #Asign the variable to the Motor.

  Motor.value='Acceleration'



  #Assign Motor type as TORQUE and assign a Torque variable

  Motor.type = 'TORQUE'

  #Asign the variable to the Motor.

  Motor.value='Torque'

Actuators

#Create variable



model.variables.add("Displacement", type=None, expression='100 mm')


model.variables.add("Velocity", type=None, expression='100 m/s')

model.variables.add("Acceleration", type=None, expression='100 m/s^2')

model.variables.add("Force", type=None, expression='10 N')

#Actuators's value can passed in four different ways (Displacement, Speed, Acceleration, 

#Force) based in its Type.



#Query an existing Actuators  with its name 'Actuator 1'

Actuator = model.getChild(type ='Actuator', name = 'Actuator 1')

if Actuator:

  #Assign Actuator type as ANGLE and assign a Angle variable

  Actuator.type = 'DISPLACEMENT'


  #Asign the variable to the Actuator.

  Actuator.value='Displacement'



  #Assign Actuator type as SPEED and assign a speed variable

  Actuator.type = 'SPEED'

  #Asign the variable to the Actuator.

  Actuator.value='Velocity'



  #Assign Actuator type as ACCELERATION and assign a Acceleration variable

  Actuator.type = 'ACCELERATION'

  #Asign the variable to the Actuator.

  Actuator.value='Acceleration'



  #Assign Actuator type as TORQUE and assign a Torque variable

  Actuator.type = 'Force'

  #Asign the variable to the Actuator.

  Actuator.value='Force'

Coil Spring

model.variables.add("Stiffness", type=None, expression='100 N/m')

model.variables.add("freelength", type=None, expression='100 mm')

model.variables.add("Force", type=None, expression='10 N')

model.variables.add("Damping", type=None, expression='1.0 N*s/m')



#Query an existing CoilSpring  with its name 'Coil Spring 1'

CoilSpring = model.getChild(type ='CoilSpring', name = 'Coil Spring 1')



#CoilSpring can have three different type namely SPRING, DAMPER, SPRINGDAMPER.



if CoilSpring:

  CoilSpring.type = 'SPRINGDAMPER'

  CoilSpring.k= 'Stiffness'

  CoilSpring.c = "Damping"

  CoilSpring.freeLength = 'freelength'


  CoilSpring.type = 'SPRING'

  CoilSpring.k= 'Stiffness'

  CoilSpring.preload = 'Force'


  CoilSpring.type = 'DAMPER'

  CoilSpring.c = "Damping"

Motion Contacts

#Create Variables

model.variables.add("static_friction_coefficient", type=None, expression='0.1')

model.variables.add("Dynamic_friction_coefficient", type=None, expression='0.3')

model.variables.add("Damping", type=None, expression='12.0 N*s/m')



#Query an existing MotionContact  with its name 'Motion Contact 1'

MotionContact = model.getChild(type ='MotionContact', name = 'Motion Contact 1')



if MotionContact:

  MotionContact.damping = "Damping"

  MotionContact.muDynamic = 'Dynamic_friction_coefficient'

  MotionContact.muStatic = 'static_friction_coefficient'

Initial Velocity

#Create variables

model.variables.add("velocity", type=None, expression='12.0 m/s')

#Query an existing InitialVelocity  with its name 'Motion Contact 1'

InitialVelocity = model.getChild(type ='TranslationalInitialCondition', name = 'Initial Velocity 1')


if InitialVelocity:

  InitialVelocity.magnitude='velocity'

Initial Angular Velocity

#Create variable

model.variables.add("AngularVelocity", type=None, expression='12.0 rpm')

#Query an existing AngularInitialCondition  with its name 'Initial Angular Velocity 1'

AngularInitialCondition = model.getChild(type ='AngularInitialCondition', name = 'Initial Angular Velocity 1')



if AngularInitialCondition:

  AngularInitialCondition.magnitude='AngularVelocity'

Coming soon,

Part 3: Mastering Variables with Inspire Python APIs - Sketch

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